Necrotising sialometaplasia is a rare inflammatory pathology of accessory salivary glands. It occurs exceptionally on the other main salivary glands. The aetiology remains to be determined. We report the case of a 37-year-old patient who came to consult for a wound and oral pain that had been evolving for 4 months. Exobuccal examination showed nothing peculiar. The intraoral examination showed an ulceration of the palatal mucosa, nonindurated, elevated, with a yellow background. Despite these signs and the absence of a history of alcohol and tobacco consumption, bleeding and lymphadenopathy, we evoked the diagnosis squamous cell carcinoma of palate. An excision biopsy was performed to confirm the diagnosis of necrotising sialometaplasia. The postoperative course was simple. In front of a palatal ulcer with raised mucosa, not indurated, not bleeding, with a yellowish background, it is necessary to think of a sialometaplasia.